John Trout Greble

John Trout Greble (19 January 1834-10 June 1861) was a Union Army lieutenant who was the first West Point graduate to be killed during the American Civil War, dying at the Battle of Big Bethel.

Biography
John Trout Greble was born in Philadelphia, Pennsylvania in 1834, and he graduated from West Point in 1854 and served in the US Army artillery. From 1854 to 1856, he served in the Third Seminole War in Florida, and he became an assistant professor at West Point before the American Civil War broke out in 1861. On 26 May 1861, he became master of ordnance at Newport News, and he joined Benjamin F. Butler's expedition to Big Bethel in June. On 10 June 1861, during the Battle of Big Bethel, he was shot in the right temple and instantly killed. His son Edwin St. John Greble went on to become a Major-General.